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Foidel Creek Mine C-82-056 2021 Annual Hydrology Report <br /> the facility. Mine site drainage is controlled through seven (7) sediment ponds (NPDES Ponds T, <br /> B, C, D, E, F, and G — see Figure 2). The Fish Creek drainage is located north of the Foidel <br /> Creek Mine surface facilities area and overlies tracts, which have been longwall mined. Fish <br /> Creek runs through the Twentymile Park syncline area. Mine water was historically discharged <br /> into Fish Creek via the Fish Creek Borehole (FCBH) pump and sodium hydroxide treatment pond <br /> facility (discharge site 115), however that practice ceased in early 2005. In 2005, an electro- <br /> coagulation treatment system was constructed re-using the FCBH pump. Treated mine water was <br /> directed back underground for dust suppression. Electro-coagulation treatment assists in <br /> minimizing pipe scaling underground. Middle Creek is located to the south of Foidel Creek, along <br /> the eastern margin of the permit boundary. The mine does not discharge into Middle Creek. <br /> Mine water is currently dewatered from wells located at the former Fish Creek vent shaft in the old <br /> Western Mining District (WMD) and the 10RT well located in the old Eastern Mining District <br /> (EMD). The wells discharge into the Area 1 Pit. The Pit supplies water to the wash plant. If the <br /> Pit overflows, it runs through a flume (site 7) into Pond D. Pond D (site 84) is an NPDES point <br /> that discharges to Foidel Creek. <br /> The Fish Creek Tipple site is located approximately 15 miles southwest of Steamboat Springs at <br /> the northeast end of Twentymile Park, covering an area of approximately 15 acres. The tipple <br /> was constructed in 1974 and ceased operation in 1983. Spoil springs (sites 303-1, 303-2, and <br /> 303-3) from the former surface operations at the Fish Creek Tipple site (east of the TC Foidel <br /> Creek Mine and Twentymile Park area) also discharge to Fish Creek at NPDES site 62. The area <br /> was reclaimed in 2012, at which time sites 303-2 and 303-3 ceased to flow. <br /> The previously surface mined area southwest of the Foidel Creek portals and primary surface <br /> facilities (Eckman Park area), has been reclaimed and has been released from bond. In addition, <br /> the former surface mine area referred to as Area 1 was released from bond in January 2002. As <br /> a result, the Colorado Department of Public Health and Environment (CDPHE) subsequently <br /> approved eliminating Ponds A (Eckman Park) and H (Area 1) from our ongoing NPDES <br /> monitoring program in 2002. <br /> Hydrologic monitoring was initiated for this area by CYCC in 1979. TC continues the monitoring <br /> program under updated DRMS permit requirements. Since mid-1987, hydrologic monitoring and <br /> 2 <br />